-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
PARAGON CONSULTANTS Inc. PRESENTS.............
TECHINIQUES OF BURGLAR ALARM BYPASSING
File Compiled by: THE RAVEN!!
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
THIS IS PART 1 OF BURGULAR ALARM BYPASSING.
DISCLAIMER: This file is written for informational purposes only.
The sysop of the bbs you got this file from does not advocate the
breaking of any laws and will not be held accountable for misuse of
the information contained in this file it is intended for uhhmm
informational purposes only! yea thats it!
This file may be reproduced or put into any newletter or fourm, the
only thing asked is that proper credit is given, it took a while to
write these files and others.
THE RAVEN
+=======+
Now on with the shit.......
Part 1 is an introduction to the various types of alarms in use today.
So we will discuss the circuits that guard a building's perimeter.
Therefore, they are used primarily on doors and windows. The most
common member of this family is the magnetic switch, the little set of
white rectangular boxes seen above doors of most businesses. RadioShack
is one business that love to use them because they market them for there
home security line. Part 2 will deal with second line defense, the area
sensor. These sensors monitor a specific area rather than a specific
point of entry. These are often called motion detectors, sinnce anyone
moving about a guarded room will be detected.(like no shit!) The way in
which these sensors achieve this goal varies between components. And in
Part 3 I will give you some general notes and observations on alarm
bypassing.
1.0 MAGNETIC CONTACT SWITCHES
The magnetic switch is the most common of all hardwired components found
on doors and windows around the world. It consits of two individual pieces,
the switch itself, and the companion magnet (see Fig 1-1). The switching
mechanism is a spring loaded lever that makes contact with a stationary
metal arm when the companion magnet is near. So the magnetic switch is a
normally closed circuit. When the magnet is pulled away (see Fig 1-2), the
lever is released from the stationary arm and the circuit is no longer
complete. So, the opening of aprotected door or window removes the magnet
from the switch, and since the circuit is no longer complete the alarm
sounds (simple electronics!!). Since the circuit of a magnetic contact
switch in normally closed wires cannot be cut to defeat the system cause
this has the same effect as removing the companion magnet.
The magnetic switch offers more opertunity for jumpering than does any
other individual component. since the wires are often visible, one only
needs to remove the insulation, and place a small wire across the circuit
to defeat and bypass the switching mechanism (fig. 1-3). The main problem
for the thief then is to locate the wires if they are not visible. Often
they are hidden behind baseboards or trimming or are snaked through the
studs behind the drywall. They may be uncovered from the outside after
the bricks and wallboard have been removed.
Figure 1-1 Figure 1-2
Closed Switch Open Switch
I II I I II I
I II I I II I
I(------)II(-------)I I(--------)II(-------)I
> I(...../)II( + )I I(:....../)II( M )I
=======@@: / )II( )I =======@@: / )II( I M )I
I( / )II( ### )I I( / )II( S A )I
I( /--:)II( ### )I I( / )II( S G )I
< I( :)II( ###